Charles Johnson has averaged 9.2 more points per game in week 14 compared to his career avg, which includes 2 more Receptions, 73 more Receiving Yards and 1 more Receiving TD per game. In other significant stat differences:

Johnson has averaged 1.8 less points per game against the AFC South compared to his career avg, with 1 less Reception and 27 less Receiving Yards per game

Johnson has averaged 1.9 less points per game against the Jaguars compared to his career avg

Johnson has averaged 2.3 less points per game in Wednesday games compared to Sunday ones

Johnson has averaged 1 more point per game against the AFC compared to the NFC, which includes 2 more Receiving Yards per game

Johnson has averaged 1.9 less points per game in 2015 - 2016 Outdoor games with
temperatures between 43 - 45° compared to his career avg

There is a difference in the amount of games played in some of the comparisons so even though a clear difference in stats appears to exist it could be caused by a lack of data points in some cases.